Load Variables into Buttons

Can anyone tell me how to load a variable from PHP into a button. For example; I want to get a value from a PHP file and load it in the getURL values within a Flash Button.
Since I cannot seem to give a button a variable name I cannot loadVariablesNum and have it read it correctly.

// inside a movie clip i placed this ...
onClipEvent(data
{
// let say your var name is ... dynaLink
// I passed it to a bunch of variable holders on _root
// I hear inserting data into objects will make code much more modular

dynaLink = _root.dynaURL;
}

onClipEvent(load)
{
loadVariables("processMe.php",this);
}

*********************************/

then, then on your button just do this

/*********************************
// if its a folder and not a file
// eg: http://www.abc.com/flash/
on(press)
{
getURL("http://www.macromedia.com/"+_root.dynaURL+"/");
}